Which to use
“lice” and “lichen” are a confusable English pair: similar on the page, but distinct in meaning, check the gloss before you choose.
- #22,140
- “lice” frequency rank
- #38,474
- “lichen” frequency rank
- 60614
- confusion score
Side-by-Side Comparison
| Feature | lice | lichen |
|---|---|---|
| Definition | plural of louse | Any of many symbiotic organisms, being associations of algae and fungi, often found as white or yellow-to-blue–green patches on rocks, old walls, etc. |
Where the eye mixes lice and lichen
Muted = shared; highlighted = the visual trap. They share 4 letters in sequence. lice runs 4 letters (CVCV) against lichen's 6 (CVCCVC) - the length gap alone is often enough to separate them once you know to check it.
Why the eye confuses lice with lichen
A purely visual mix-up. lice (/laɪs/) and lichen (/ˈlaɪ.kən/) are said differently, so reading them aloud is the quickest way to catch the wrong one. On the page they stay close: they differ by 2 letter(s) in length. Our composite confusion score for this pair is 60614, derived from the frequency rank of both members and their visual similarity.
lice is recorded at frequency rank #22,140, classified as anoun, pronounced /laɪs/. lichen is at rank #38,474, tagged as anoun, pronounced /ˈlaɪ.kən/.
Glosses for this pair are partially populated in our dataset, but the full side-by-side definitions above should still guide you to the right choice.
With a confusion score of 60614, this pair ranks #99,178 of 530,003 scored English confusable pairs - among the most confusable pairs.
Orthographic DNA of lice vs lichen
Shared letters: ceil. Private to "lice": -. Private to "lichen": hn.
"lice" · 4 letters · shape CVCV · "lichen" · 6 letters · shape CVCCVC
Known mistypes of this pair
Frequently Asked Questions
Is swapping "lice" for "lichen" ever safe?
Which is more common, "lice" or "lichen"?
What to do next
Visual near-miss handled. Browse the word pages or a neighbour when the next look-alike shows up.
- Full dictionary entry for "lice" with definition, IPA, and generated misspellings. Word entry
- Full dictionary entry for "lichen" - compare definitions side by side with the headword page. Word entry
- This pair ranks #99,178 of 530,003 scored English confusable pairs in this corpus vintage. Corpus statistics
- "lice" and "lichen" also get mixed up with nearby pairs, the highest-scored neighbour is "lichen vs liken". Nearby pair
- Recorded mistypes exist for at least one side of this pair, useful when a spell-checker or OCR lands on the wrong form. See mistypes
Confusion rank #99,178 of 530,003 scored English pairs, corpus vintage 2026-09-03, not spelling advice.